EP2241587B1 - Hydrophilic polysiloxane monomer, and production method and application thereof - Google Patents

Hydrophilic polysiloxane monomer, and production method and application thereof Download PDF

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EP2241587B1
EP2241587B1 EP09708990.8A EP09708990A EP2241587B1 EP 2241587 B1 EP2241587 B1 EP 2241587B1 EP 09708990 A EP09708990 A EP 09708990A EP 2241587 B1 EP2241587 B1 EP 2241587B1
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general formula
hydrophilic
hydrophilic polysiloxane
polysiloxane macromonomer
producing
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EP2241587A1 (en
EP2241587A4 (en
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Hiroyuki Ueyama
Seiichiro Ikawa
Junichi Iwata
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CooperVision International Holding Co LP
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/12—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
    • C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
    • C08F290/06—Polymers provided for in subclass C08G
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
    • C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
    • C08F290/06—Polymers provided for in subclass C08G
    • C08F290/061—Polyesters; Polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
    • C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
    • C08F290/06—Polymers provided for in subclass C08G
    • C08F290/068—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/42—Introducing metal atoms or metal-containing groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/38—Polysiloxanes modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/42—Block-or graft-polymers containing polysiloxane sequences
    • C08G77/46—Block-or graft-polymers containing polysiloxane sequences containing polyether sequences
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses
    • G02B1/043—Contact lenses

Definitions

  • the present invention relates to novel hydrophilic polysiloxane macromonomers, methods of production thereof, and ophthalmic lenses employing the hydrophilic polysiloxane macromonomers and, in particular, to a contact lens.
  • the present invention relates to a contact lens having both of oxygen permeability and a hydrophilic property, and raw materials therefor.
  • High oxygen permeability is demanded for ophthalmic lenses, in particular, for contact lenses, which need supply of oxygen, necessary for maintaining corneal health statuses, from an air medium.
  • contact lenses in which siloxane monomers as raw materials are employed for improving oxygen permeability, have been developed.
  • High hydrophilic properties as well as oxygen permeability are also demanded for contact lenses.
  • Contact lenses with high hydrophilic properties are said to generally have good wear comfort and be comfortably wearable for long time.
  • Hydrophilic monomers are commonly used as raw materials in order to improve hydrophilic property of contact lenses.
  • hydrophilic contact lenses produced from polysiloxane containing hydrophilic side chains are disclosed in Patent Document 1 and Patent Document 2, wherein compounds containing polyether groups, hydroxyl groups, amide groups, and quaternary amine groups as hydrophilic side chains are selected; however, since the specifically disclosed polysiloxane contains comparatively many hydrophilic side chains which have a comparatively low molecular weight, per molecule, a balance between a hydrophilic property and oxygen permeability is inadequate, and it was difficult to use the polysiloxane as a raw material for an ophthalmic lens with high oxygen permeability and a high hydrophilic property.
  • a plastic molding article produced from plastic which includes a compound having a group with a polymerizable double bond, a hydroxyl group, an organosiloxane group, and an amide group as a polymerization ingredient is disclosed in Patent Document 3.
  • the polymerization ingredient allows production of the plastic molding article with high transparency, high oxygen permeability, good water wettability, and good mechanical properties.
  • the specifically disclosed compound had short siloxane chains, effective oxygen permeability was not obtained.
  • the compound had only one polymerizable functional group per molecule, adequate strength was precluded.
  • a hydrogel soft contact lens comprising a hydrophilic siloxane monomer and a copolymer thereof is disclosed in Patent Document 4, Patent Document 5 and Patent Document 6, wherein the hydrophilic siloxane monomers contain main chains, in which polymerizable groups and polysiloxane chains are bound through urethane or urea groups, including fluorine-substituted hydrocarbon and polyoxyalkylene groups as side chains. Since hydrophilic siloxane monomers containing urethane or urea groups have high intermolecular forces, copolymers thereof are also prone to have a comparatively high modulus of elasticity, and there were cases where flexibility greatly affecting the wear comfort of contact lenses was lost. [Patent Document 1] Japanese Patent Publication No.
  • Patent Document 2 Japanese Patent Publication No. 62-29777 [Patent Document 3] Japanese Patent No. 3,644,177 [Patent Document 4] International Publication WO 01/044861 [Patent Document 5] International Publication WO 2006/026474 [Patent Document 6] Japanese Patent No. 3,441,024 US4260725 discloses a contact lens comprising a polysiloxane which is ⁇ , ⁇ terminally bonded through divalent hydrocarbon groups to polymerizably activated unsaturated groups and which contains hydrophilic side chains.
  • JP 2003 192790 discloses a radically polymerizable organosiloxane mixture comprising (A) a radically polymerizable organopolysiloxane having a reactive functional group or a silicon-bonded hydrogen atom at either terminal, (B) a radically polymerizable organopolysiloxane have a reactive functional group or a silicon-bonded hydrogen atom at each terminal, and (C) a reactive organopolysiloxane free from a radically polymerizable group.
  • the present invention addresses problems of providing an ophthalmic lens, in particular, contact lens, which has both of oxygen permeability and a hydrophilic property; and of providing a novel hydrophilic polysiloxane macromonomer, which can be used as a raw material thereof, and a method of production of the macromonomer.
  • hydrophilic polysiloxane macromonomer as a raw material, containing a polysiloxane main chain including polyoxyethylenes as hydrophilic side chains, was found to be effective at pursuing both of the high oxygen permeability and high hydrophilic property of an ophthalmic lens, in particular, a contact lens.
  • oxygen permeability and hydrophilic property were found to be greatly affected by the length of the polysiloxane main chain, the length of the hydrophilic polyoxyethylene side chains and the number of the included side chains, and the invention was thus accomplished.
  • a hydrophilic polysiloxane macromonomer in which both terminals of a main chain have polymerizable functional groups and the polymerizable functional groups and polysiloxane of the main chain are bound through ester groups, was further found to be effective at adequately controlling strength and a modulus of elasticity which greatly affect the usability and wear comfort of a contact lens.
  • a hydrophilic polysiloxane macromonomer presented in general formula (1) is exemplified: wherein R 1 is selected from either hydrogen or a methyl group; R 2 is selected from either of hydrogen or a C 1-4 hydrocarbon group; m represents an integer of from 0 to 10; n represents an integer of from 4 to 100; a and b represent integers of 1 or more; a+b is equal to 20-500; b/(a+b) is equal to 0.01-0.22; and the configuration of siloxane units includes a random configuration.
  • the configuration of siloxane units includes a random configuration
  • the siloxane units containing polyoxyethylene as hydrophilic side chains and siloxane units excluding the polyoxyethylene side chains may be arranged randomly or in block form, or random and block configurations may coexist in one molecule.
  • a rate between random and block configurations may be also optional, for example, only a random or block configuration may be included in one molecule, or the random and block configurations may be included at an optional rate.
  • the present invention also relates to hydrophilic polysiloxane macromonomers, wherein a and b, presented in the general formula (1), represent 25-200 and 2-20, respectively; to hydrophilic polysiloxane macromonomers, wherein n, presented in the general formula (1), represents 5-20; and to hydrophilic polysiloxane macromonomers, wherein a and b, presented in the general formula (1), represent 25-160 and 3-10, respectively, and n represents 5-15.
  • the present invention also relates to methods of producing hydrophilic polysiloxane macromonomers represented by general formula (1), which is obtained via polysiloxane represented by general formula (2) as an intermediate: wherein R 1 is selected from either hydrogen or a methyl group; m represents an integer of from 0 to 10; c and d represent integers of 1 or more; c+d is equal to 20-500; d/(c+d) is equal to 0.01-0.22; and the configuration of siloxane units includes a random configuration.
  • R 1 is selected from either hydrogen or a methyl group
  • m represents an integer of from 0 to 10
  • c and d represent integers of 1 or more
  • c+d is equal to 20-500
  • d/(c+d) is equal to 0.01-0.22
  • the configuration of siloxane units includes a random configuration.
  • the present invention also relates to a method in which the step of producing the polysiloxane intermediate represented by general formula (2) is carried out by ring-opening polymerization of cyclic dimethylsiloxane, cyclic siloxane having hydrosilane (Si-H), and siloxane having (meth) acrylic groups at both terminals using an acid catalyst and by stopping the ring-opening polymerization by neutralization reaction with a basic aqueous solution.
  • the step of producing the polysiloxane intermediate represented by general formula (2) is carried out by ring-opening polymerization of cyclic dimethylsiloxane, cyclic siloxane having hydrosilane (Si-H), and siloxane having (meth) acrylic groups at both terminals using an acid catalyst and by stopping the ring-opening polymerization by neutralization reaction with a basic aqueous solution.
  • the present invention also relates to a method of producing the hydrophilic polysiloxane macromonomers represented by general formula (1) comprising hydrosilylation reaction of the intermediate represented by general formula (2) with polyethylene glycol allyl ether represented by general formula (3): wherein R 2 is selected from either hydrogen or a C 1-4 hydrocarbon group; and n represents an integer of from 4 to 100.
  • the hydrosilylation reaction may uses, as a catalyst therefor, a platinum-containing catalyst, and the production method may further comprise the step of washing the hydrophilic polysiloxane macromonomer with a solvent after the reaction.
  • the present invention also relates to homopolymers of the above-mentioned hydrophilic polysiloxane macromonomers, or to copolymers copolymerized the above-mentioned hydrophilic polysiloxane macromonomers with one or more polymerizable monomers, ophthalmic lens materials employing these polymers, and ophthalmic lenses and contact lenses employing these materials.
  • hydrophilic polysiloxane macromonomer of the present invention has good compatibility with polymerizable mixtures containing a hydrophilic monomer, a transparent copolymer is afforded, and high oxygen permeability can be also maintained.
  • the hydrophilic polysiloxane macromonomer utilizing these characteristics is useful as an ophthalmic lens material with a high hydrophilic property and high oxygen permeability.
  • ophthalmic lenses are not limited in particular, are preferably understood to be lenses fitted to the anterior eye segment for purposes such as vision correction, test and therapy, and preferably include, e.g., an intraocular lens, a corneal lens, and a contact lens.
  • a+b is equal to 20-500, b/ (a+b) is equal to 0.01-0.22, and n represents 4-100; preferably a+b is equal to 27-220, b/(a+b) is equal to 0.01-0.15, and n represents 5-20; more preferably, a+b is equal to 28-160, b/(a+b) is equal to 0.01-0.10, and n represents 5-15.
  • a and b per specific hydrophilic polysiloxane macromonomer molecule are preferably equal to 25-200 and 2-20, respectively; more preferably, 25-160 and 3-10, respectively, allowing a balance between oxygen permeability and a hydrophilic property.
  • the ratio and total number of c and d may be optionally controlled by varying the compounding ratio of cyclic dimethylsiloxane, cyclic siloxane having hydrosilane (Si-H), and disiloxane having (meth)acrylic groups at both terminals.
  • a polysiloxane intermediate obtained in this manner has no single molecular weight but has a molecular weight distribution as in case of a typical synthetic polymer.
  • a synthesis method is described in more detail. After ring-opening polymerization of a mixture of cyclic dimethylsiloxane, cyclic siloxane having hydrosilane (Si-H), and siloxane having (meth)acrylic groups at both terminals using an acid catalyst such as sulfuric acid, trifluoromethanesulfonic acid or acid clay, preferably trifluoromethanesulfonic acid having a high acidity and a high catalytic activity, the reaction can be stopped by addition of a basic aqueous solution.
  • the basic aqueous solution preferably has a pH of more than 7 but 14 or less, more preferably a weakly basic pH of more than 7 but 9 or less which inhibits a side reaction from occurring.
  • reaction solvent As a reaction solvent, no solvent may be used in the reaction, or a solvent that does not inhibit the ring-opening polymerization by an acid catalyst may be used.
  • Reaction solvents include, for example, tetrahydrofuran, dioxan, hexane, cyclohexane, heptane, cycloheptane, chloroform, dichloromethane, dichloroethane, dimethoxyethane, toluene, benzene, xylene, diethyl ether, diisoprpyl ether, acetone, and methyl ethyl ketone.
  • reaction temperature may be in the range of 0-150°C, preferably 20-100°C, more preferably 25-80°C. The higher reaction temperature results in acceleration of the reaction, but unfavorably allows occurrence of a side reaction due to polymerization of, e.g., (meth)acrylic groups.
  • a polymerization inhibitor e.g., HQ (hydroquinone), BHT (2,6-di-t-butyl-4-methylphenol) or MQ (p-methoxyphenol) may be previously added into a reaction system to inhibit a side reaction due to radical polymerization of, e.g., (meth)acrylic groups during ring-opening polymerization.
  • HQ hydroquinone
  • BHT 2,6-di-t-butyl-4-methylphenol
  • MQ p-methoxyphenol
  • An example of a method of producing a polysiloxane intermediate represented by the aforementioned general formula (2) includes a method comprising the step of synthesizing a compound represented by general formula (6) as an intermediate, as shown in the following reaction formula (b): wherein R 1 is selected from either hydrogen or a methyl group; m represents an integer of from 0 to 10; p and q represent integers of from 3 to 10, preferably from 3 to 5; c and d represent integers of 1 or more; c+d is equal to 20-500; d/(c+d) is equal to 0.01-0.22; e represents an integer of from 0 to 500; and the configuration of siloxane units includes a random configuration.
  • Siloxane having (meth)acrylic groups at both terminals represented by general formula (6) is commercially available as TSL9706 (manufactured by Momentive), and also may be synthesized by following methods, for example.
  • a first example of a method of synthesizing siloxane of general formula (6) is exhibited in reaction formulas (c) and (d) described below. That is, the example includes a method comprising carrying out hydrosilylation reaction between siloxane having SiH groups at both terminals represented by general formula (9) and polyoxyalkylene having a terminal hydroxyl group and an allyl group represented by general formula (10) to generate a polyoxyalkylene-polysiloxane block copolymer with both terminal hydroxyl groups represented by general formula (7) in the reaction formula (c); and then reacting the block copolymer (7) obtained in the above-mentioned reaction with (meth)acrylic acid represented by general formula (8) or a reactive derivative thereof to synthesize siloxane having (meth) acrylic groups at both terminals represented by general formula (6) in the following reaction formula (d): wherein R 1 is selected from either hydrogen or a methyl group; m represents an integer of from 0 to 10; and e represents an integer of
  • reaction formulas (e) and (f) Another example of a method of synthesizing siloxane of general formula (6) is exhibited in reaction formulas (e) and (f) as described below. That is, the other example includes a method comprising reacting polyoxyalkylene having a terminal hydroxyl group and an allyl group represented by general formula (10) with (meth)acrylic acid represented by general formula (8) or a reactive derivative thereof to generate polyoxyalkylene having a terminal allyl group and a (meth)acrylic group represented by general formula (11) in reaction formula (e); and then carrying out hydrosilylation reaction of (11) obtained in the above-mentioned reaction with siloxane having SiH groups at both terminals represented by general formula (9) to synthesize siloxane having (meth)acrylic groups at both terminals represented by general formula (6) in the following reaction formula (f): wherein R 1 is selected from either hydrogen or a methyl group; m represents an integer of from 0 to 10; and e represents an integer
  • hydrophilic polysiloxane macromonomer represented by general formula (1) may be obtained by an addition of polyethylene glycol allyl ether to the intermediate presented in general formula (2)utilizing a so-called hydrosilylation reaction, which is an addition reaction to hydrosilane using a transition metal catalyst such as chloroplatinic acid.
  • the hydrophilic polysiloxane macromonomer also becomes a compound having a molecular weight distribution as well as a polysiloxane intermediate thereof.
  • R 2 is selected from either hydrogen or a C 1-4 hydrocarbon group; n represents an integer of from 4 to 100, particularly preferably 5 to 20, further preferably 5 to 15; and R 2 is preferably hydrogen or a methyl group.
  • R 2 is preferably hydrogen or a methyl group.
  • it is important to add a larger amount of polyethylene glycol allyl ether than a stoichiometric ratio, allowing inhibition of a side reaction due to an unreacted SiH group, e.g., inhibition of hydrolysis to obtain a macromonomer of stable quality.
  • surplus polyethylene glycol allyl ether can be easily removed by a purification method with a solvent as described below, after the reaction.
  • Transition metal catalysts for hydrosilylation reaction include, e.g., ruthenium, rhodium, iridium, osmium, and platinum; preferably a platinum-containing catalyst; more preferably hexachloroplatinic acid, 1,3-divinyltetramethyldisiloxane platinum complex, platinum carried on activated carbon, and platinum (IV) oxide; most preferably hexachloroplatinic acid exhibiting a high catalytic activity.
  • reaction solvent a solvent that does not inhibit hydrosilylation reaction and react itself may be used.
  • Reaction solvents include, for example, isopropanol, tetrahydrofuran, dioxan, hexane, cyclohexane, heptane, cycloheptane, chloroform, dichloromethane, dichloroethane, dimethoxyethane, benzene, toluene, and xylene.
  • a method of protecting a hydroxyl group to inhibit side reaction between hydroxyl and SiH groups may be used, more preferably, a method of adding a buffer agent is particularly easily used.
  • a buffer agent is particularly easily used.
  • potassium acetate is particularly useful.
  • Reaction temperature may be in the range of 0-150°C, preferably 25-100°C, more preferably 35-85°C.
  • the higher reaction temperature results in acceleration of the reaction, but unfavorably allows occurrence of a side reaction due to polymerization of, e.g., (meth)acrylic groups.
  • a washing operation with a solvent may be performed as a purification method following hydrosilylation reaction.
  • a hydrophilic polysiloxane macromonomer of interest can be precipitated and separated by dissolution of a crude product in a first solvent, followed by addition of a second solvent.
  • the first solvent as used herein refers to a solvent in which a macromonomer represented by general formula (1) is easily dissolved
  • the second solvent refers to a solvent in which the macromonomer represented by general formula (1) is difficult to dissolve and polyethylene glycol allyl ether used is dissolved.
  • First solvents include methanol, ethanol, propanol, isopropanol, butanol, isobutanol, acetone, tetrahydrofuran, dioxan, chloroform, dichloromethane, dichloroethane, and ethylene glycol.
  • Second solvents include, e.g., water.
  • a macromonomer of interest can be obtained by distilling out a solvent after purification.
  • an appropriate amount of polymerization inhibitor such as HQ (hydroquinone), BHT (2,6-di-t-butyl-4-methylphenol) or MQ (p-methoxyphenol), may be also previously added in order to prevent gelation.
  • the present invention is to disclose a polymer of hydrophilic polysiloxane macromonomer alone, presented in the general formula (1), or a copolymer obtained by copolymerizing said hydrophilic polysiloxane macromonomer with one or more polymerizable monomers, and an ophthalmic lens material.
  • Ophthalmic lenses to which the present invention is applicable include an intraocular lens and a corneal lens, and further preferably, contact lenses.
  • a copolymerizable monomer will now be described below. Any monomer may be used if it is copolymerizable in the present invention, in particular, hydrophilic monomers are useful. That is because the hydrophilic monomers improve the surface hydrophilic properties of hydrophilic polysiloxane macromonomer copolymers and vary water content of the copolymer.
  • copolymerizable monomers examples include a hydroxyl group-containing monomer such as 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl acrylate, 4-hydroxybutyl acrylate or glycerol methacrylate; a hydroxyl group-containing monomer having a fluorine-containing substituent such as 3-(1,1,2,2-tetrafluoroethoxy)-2-hydroxypropyl methacrylate; a carboxylic acid group-containing monomer such as methacrylic acid, acrylic acid, itaconic acid, fumaric acid or maleic acid; an alkyl-substituted amino group-containing monomer such as dimethylaminoethyl methacrylate or diethylaminoethyl methacrylate; an amide group-containing monomer such as N,N-dimethylacrylamide, N,N-diethylacrylamide, N-methylacrylamide, methylenebisacrylamide, diacetone acrylamide
  • An example of other usable monomers is a fluorine-containing monomer such as acrylic acid fluoroalkyl ester or methacrylic acid fluoroalkyl ester, including, e.g., trifluoroethyl acrylate, tetrafluoroethyl acrylate, tetrafluoropropyl acrylate, pentafluoropropyl acrylate, hexafluorobutyl acrylate, hexafluoroisopropyl acrylate and methacrylates corresponding to these acrylates, which may be selected depending on needed compatibility, hydrophilic property, water content and resistance to deposition.
  • a fluorine-containing monomer such as acrylic acid fluoroalkyl ester or methacrylic acid fluoroalkyl ester, including, e.g., trifluoroethyl acrylate, tetrafluoroethyl acrylate, tetrafluoropropyl
  • siloxane such as tris(trimethylsiloxy)silylpropyl methacrylate, ⁇ -butyl- ⁇ - ⁇ 3-[2-(2-methacryloxyethylcarbamoyloxy)ethoxy]propyl ⁇ po lydimethylsiloxane, a siloxane-containing macromonomer described in Examples A-1, B-1, C-1 and D-1 in Japanese Patent Publication No. H11-502949 , a siloxane-containing monomer (V2D25) described in U.S. Pat. No. 5260000 , a siloxane-containing macromonomer described in Example 1 in Japanese Patent Publication No.
  • a siloxane-containing macromonomer (A1, A2) in International Publication WO2004/063795 , and a siloxane-containing macromonomer described in Example 1 in Japanese Patent Publication No. 2001-311917 may be selected to improve oxygen permeability.
  • alkyl acrylate ester monomer an alkyl methacrylate ester monomer, or the like may be also used as needed, examples of which include methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, cyclopentyl acrylate, n-stearyl acrylate, and methacrylates corresponding to these acrylates.
  • Monomers described below may be optionally copolymerized to improve mechanical properties and dimensional stability.
  • monomers to improve the mechanical properties include monomers affording high glass transition point polymers , which are aromatic vinyl compounds such as styrene, tert-butylstyrene, ⁇ -methylstyrene, and t-butyl methacrylate, cyclohexyl methacrylate, and isobornyl methacrylate.
  • Crosslinkable monomers are particularly useful in further improving dimensional stability, examples of which include ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetramethacrylate, bisphenol A dimethacrylate, vinyl methacrylate, allyl methacrylate and acrylates corresponding to these methacrylates; triallyl isocyanurate; divinylbenzene; and N,N'-methylene bisacrylamide.
  • One or a combination of two or more of these monomers may be used.
  • the properties of copolymers can be controlled by varying the compounding ratios of copolymerizable monomers.
  • the ratios of a hydrophilic polysiloxane macromonomer, a hydrophilic monomer and another monomer are preferably 10-90%, 10-80% and 0-80%, respectively, more preferably 30-80%, 10-60% and 0-30%, respectively, most preferably, 30-70%, 20-50% and 5-20%, respectively, to afford effective properties for an ophthalmic lens material.
  • additives may be added before and after polymerization as necessary.
  • additives include various coloring agents, a UV absorbent, an antioxidizing agent, a surfactant, and a compatibilizer.
  • a hydrophilic polymer such as polyvinyl pyrrolidone according to the aforementioned Japanese PCT National Publication No. 2003-528183 may be also added to improve wettability.
  • Copolymerization methods which can be used include, e.g., radical polymerization, cationic polymerization, anionic polymerization, and addition polymerization.
  • a radical polymerization method of making a photoinitiator present in a monomeric mixture to be irradiated with ultraviolet light to perform polymerization or a radical polymerization method of performing polymerization using an azo compound or organic peroxide by heating preferred.
  • photoinitiators used include benzoinethylether, benzyldimethylketal, ⁇ , ⁇ '-diethoxyacetophenone, and 2,4,6-trimethylbenzoyldiphenylphosphineoxide.
  • organic peroxides used include benzoyl peroxide and t-butyl peroxide.
  • azo compounds used include azobisisobutyronitrile and azobisdimethylvaleronitrile.
  • a cross-linking polymer to be used as an ophthalmic lens material according to the present invention may be formed into a contact lens or the like by, e.g., a cast polymerization method of filling a mold with a mixture including a hydrophilic polysiloxane monomer, a copolymerization monomer and an initiator to perform radical polymerization by a well-known method; a method of performing polymerization by loading a monomer mixture in a rotating half mold; or a method of freezing and cutting a copolymer at low temperature.
  • a surface of a formed lens may be also further subjected to, for example, plasma treatment, ozone treatment, graft polymerization or plasma polymerization, to reform it, as needed.
  • the structural formula of a synthesized hydrophilic polysiloxane macromonomer is presented in general formula (12), wherein the configuration of siloxane units includes a random configuration.
  • general formula (12) a hydrophilic polysiloxane macromonomer represented by general formula (1), wherein R 1 represents a methyl group, is presented.
  • a 1 H-NMR chart of the synthesized hydrophilic polysiloxane macromonomer A is shown in Fig. 1 ; and its infrared absorption chart is shown in Fig. 2 .
  • Synthesis was carried out by the same method as in Example 1, except that the amount of LS8600 was changed to 15 g, to obtain 110 g of an intermediate B. Furthermore, 15 g of the intermediate B and 20 g of Uniox PKA5007 were dissolved in 30 g of isopropanol, and synthesis and washing were performed as in Example 2 to obtain 10 g of a hydrophilic polysiloxane macromonomer D of interest.
  • hydrophilic polysiloxane macromonomer A synthesized in Example 2 N-methyl-N-vinylacetamide, N-vinyl pyrrolidone, isobornyl methacrylate, triallyl isocyanurate, and a polymerization initiator 2,4, 6-trimethylbenzoyldiphenylphosphine oxide were mixed and stirred at a weight ratio of 66:18:10:6:0.1:0.1.
  • This mixed liquid was put in a mold for a contact lens, made of Soarlite S (The Nippon Synthetic Chemical Industry Co., Ltd.) comprising ethylene vinyl alcohol resin, and was irradiated with ultraviolet light in a photoirradiation device for 1 hour to obtain a lenticular polymer.
  • This polymer was immersed overnight in ethyl alcohol and then immersed in water all day long.
  • This lens was transferred into a physiological saline solution (ISO 18369-3:2006) and then sterilized in an autoclave to provide a contact lens A.
  • the contact lens A was transparent and flexible, and also had good water wettability. On assessing properties, a water content was 37%, a contact angle was 41°, an oxygen permeability coefficient (Dk) was 130, and tensile strength was 1.5 MPa.
  • Wettability with a physiological saline solution was assessed by visual observation. A lens immersed in a physiological saline solution for 24 hours or longer was perpendicularly raised from the physiological saline solution. Good: A water film was held on more than half of the lens surface for ⁇ 5 seconds. Average: 1 to 5 seconds. Poor: ⁇ 1 second.
  • the lens was placed in a physiological saline solution at 37°C for 72 hours, and then taken out, and water on the surface was wiped off to weigh the lens.
  • a contact angle measuring apparatus DropMaster 500 (Kyowa Interface Science) was used to measure a contact angle between a material surface and a water droplet at 25°C.
  • An oxygen permeability was measured according to a method described in " A single-lens polarographic measurement of oxygen permeability (Dk) for hypertransmissible soft contact lenses” (Biomaterials, 28(2007), 4331-4342 ). The oxygen permeability was measured in (ml ⁇ cm/cm 2 ⁇ sec ⁇ mmHg)x10 -11 .
  • Tensile strength was measured in a physiological saline solution of 25°C using a tensile testing machine AGS-50B (Shimadzu Corporation). The central area (width of 3 mm) of the lens was cut out to measure its strength in breaking. The strength was measured in MPa.
  • hydrophilic polysiloxane macromonomer A was substituted with hydrophilic polysiloxane macromonomers B to E, and contact lenses B to E were produced by the same method as in Example 10 to assess their physical properties. The assessment results are shown in Table 1.
  • hydrophilic polysiloxane macromonomer A synthesized in Example 2 N-methyl-N-vinylacetamide, N-vinyl pyrrolidone, hydroxybutyl methacrylate, ⁇ -butyl- ⁇ - ⁇ 3-[2-(2-methacryloxyethylcarbamoyloxy)ethoxylpropyl ⁇ po lydimethylsiloxane, isobornyl methacrylate, triallyl isocyanurate, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, and dioctyl sulfosuccinate sodium salt as an additive were mixed and stirred at a weight ratio of 44:10:30:10:10:6:0.1:0.1:0.5.
  • This mixed liquid was put in a mold for a contact lens, made of Soarlite S (The Nippon Synthetic Chemical Industry Co., Ltd.), and was irradiated with ultraviolet light in a photoirradiation device for 1 hour to obtain a lenticular polymer.
  • This polymer was immersed overnight in ethyl alcohol and then immersed in water all day long.
  • This lens was transferred into a physiological saline solution (ISO 18369-3:2006) and then sterilized in an autoclave to provide a contact lens F.
  • the contact lens F was transparent and flexible, and also had good water wettability. On assessing properties, a water content was 44%, a contact angle was 44°, an oxygen permeability coefficient (Dk) was 115, and tensile strength was 3.0 MPa.
  • Example 15 The hydrophilic polysiloxane macromonomer A in Example 15 was substituted with the hydrophilic polysiloxane macromonomers F to G, and contact lenses G to H were produced by the same method as in Example 17, and their properties were assessed. The assessment results are shown in Table 1.
  • hydrophilic polysiloxane macromonomer A synthesized in Example 2 N-methyl-N-vinylacetamide, methyl methacrylate, triethylene glycol dimethacrylate, 2-hydroxy-4-acryloxyethoxybenzophenone, 2,2'-azobis(2,4-dimethylvaleronitriles), and dimethylsiloxan-ethylene oxide block copolymer (DBE712, Gelest) as an additive were mixed and stirred at a weight ratio of 35:47:17:0.2:0.9:0.5:25. Decompression and nitrogen purge of this mixed liquid were repeated twice to fully remove oxygen from the mixed liquid, followed by putting the mixed liquid in a mold for a contact lens, made of polypropylene.
  • the mold was placed in a chamber for exclusive use, and nitrogen substitution was performed, followed by heating the mold for 30 minutes at 55°C, and subsequently for 60 minutes at 80°C, to obtain a lenticular polymer.
  • This polymer was immersed overnight in ethyl alcohol and then immersed in water all day long.
  • This lens was transferred into a physiological saline solution (ISO 18369-3:2006) and then sterilized in an autoclave to provide a contact lens I.
  • the contact lens I was transparent and flexible, and also had good water wettability. On assessing properties, a water content was 40%, a contact angle was 42°, an oxygen permeation coefficient (Dk) was 110, and tensile strength was 2.5 MPa.
  • Example 10 The hydrophilic polysiloxane macromonomer A in Example 10 was substituted with the hydrophilic polysiloxane macromonomers H to J, and contact lenses J to L were produced by the same method as in Example 10 to assess their physical properties. The assessment results are shown in Table 1.
  • Example Comparative example 10 11 12 13 14 15 16 17 18 4 5 6 Contact lens A B C D E F G H I J K L Hydrophilic polysiloxane macromonomer A B C D E A F G A H I J a ca.90 ca.90 ca.90 ca.85 ca.130 ca.90 ca.85 ca.160 ca.90 ca.15 ca.75 ca.110 b ca.5 ca.5 ca.5 ca.10 ca.5 ca.5 ca.10 ca.4 ca.5 0 ca.25 ca.1 n ca.7 ca.7 ca.35 ca.7 ca.7 ca.7 ca.7 ca.15 ca.7 ca.7 0 ca.1 ca.35 m 0 0 0 0 0 0 0 R2 CH 3 H CH 3 CH 3 CH 3 H CH 3 CH 3 - H CH 3 a+b ca.95 ca.95 ca.95 ca.95 ca.1 ca.1
  • Dissolution of 45.05 g of the intermediate H and 30.05 g of polyethylene glycol allyl ether having a molecular weight of about 400 (Uniox PKA5002, NOF Corporation) in 90.45 g of isopropanol was performed, 0.46 g of a 10% potassium acetate/ethanol solution, 0.91 g of a 1% isopropanol solution of chloroplatinic acid and 5.9 mg of 2,6-di-t-butyl-4-methyl phenol (BHT) were further added to this mixture, and this mixture was heated to reflux for 1 hour in an oil bath at 93°C.
  • BHT 2,6-di-t-butyl-4-methyl phenol
  • reaction solvent was distilled out under reduced pressure, and 60 g of acetone and 30 g of pure water were added to the residue to vigorously stir this mixture, followed by centrifugation (7000 rpm, 10°C, 10 minutes) of the mixture, followed by removing the upper layer. This operation was repeated ten times, and 3.3 mg of BHT, 2.0 mg of p-methoxyphenol (MQ) and 60 g of isopropanol were added to this mixture, and vacuum concentration of this mixture was carried out.
  • MQ p-methoxyphenol
  • Synthesis was carried out by the same method as in Example 20, except that polyethylene glycol allyl ether (Uniox PKA5002, NOF Corporation) used in Example 20 was substituted with methoxy polyethylene glycol allyl ether having a molecular weight of about 400 (Uniox PKA5007, NOF Corporation), to obtain 56.83 g of a hydrophilic polysiloxane macromonomer L of interest.
  • hydrophilic polysiloxane macromonomer A in Example 15 was substituted with the hydrophilic polysiloxane macromonomers K to M, contact lenses M to O were produced by the same method as in Example 18, respectively, and their physical properties were assessed. The assessment results are shown in Table 2.
  • a hydrophilic polysiloxane macromonomer of the present invention has good compatibility with polymerizable mixtures containing a hydrophilic monomer, a transparent copolymer is afforded.
  • the copolymer having both of high oxygen permeability and a high hydrophilic property of the material is useful as a raw material for an ophthalmic lens, more specifically, an ophthalmic lens with a high hydrophilic property and high oxygen permeability, in particular, a contact lens material.

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KR20100106479A (ko) 2010-10-01
US20090234089A1 (en) 2009-09-17
WO2009099164A1 (ja) 2009-08-13
CA2712094A1 (en) 2009-08-13
JP5490547B2 (ja) 2014-05-14
CN101932632B (zh) 2015-06-24
US8129442B2 (en) 2012-03-06
EP2241587A1 (en) 2010-10-20
KR101259677B1 (ko) 2013-05-02
CA2712094C (en) 2013-05-28
JPWO2009099164A1 (ja) 2011-05-26
EP2241587A4 (en) 2012-05-16
MX2010008174A (es) 2010-08-11
BRPI0906434A2 (pt) 2015-07-14
BRPI0906434B1 (pt) 2019-11-19
US8524850B2 (en) 2013-09-03
US20120184698A1 (en) 2012-07-19
MY153130A (en) 2014-12-31
ES2431353T3 (es) 2013-11-26
AU2009211623A1 (en) 2009-08-13
AU2009211623B2 (en) 2012-04-12
CN101932632A (zh) 2010-12-29

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